Peters



@latini-gieten l-stent @fge Letters .Patent No. 79,629, dated July 7, 1868 IMPROVEMENT IN MACHINE Pos MAKING ceses.

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'To ALI'. wHoM I 'I MAY Coussins:

Be it known thatI, BENJAMIN S. BENSON, of thecity and county of Baltimore, and State ,of Maryland, have invented a new and useful Improvementin Making Cores for Castings; and I; do hereby decla-re that the following is-a full, clear, and exact description of the construction and operation of ythe-saine, refcrencerbeing had t the annexed drawings, making a part of this specieatiomin which- A I i Figure 1 is aside elevation.

Figure 2 is a cross-section.

Figure 3 is a bottom view.;

` This invention relates to the manufacture ofcores for casting metallic pipe, and consists in an'improved device by which such cores are held and rotated while receiving their outer coating-of loam, and are then dropped'gently upon elastic receivers in such a manner as to leave the surface ofthe core perfectly smooth.

In the drawings, A represents a`bed,1baseplate, or table,vupon which the4 apparatus is supported,and to whichit is attached.. B B are ourved'rspring-arms, projecting horizontallyfrom its under surface, upon which. the coreis dropped bythe action of the' machine after being formed. C C are arms, projecting nearly.'parallel to the arms B B at eac'hf'endof the table A,andsupportng two shafts, D D', which rotate in bearings in said arms. The shafts are situated end toend, in the same straight line, and at such a distance apart that they will,v receive the core-spindle betweenv'them. At their inner ends they'are each provided with an enlarged hollow" socket or chuck, d d, the recess in the end ofy which is largeenough to receive the end of the`core-ba'r E.

v `'lheseshafts slide longitudinally in their bearings, so that when they are drawn apart the core-bar may be inserted between them, and when brought together again the hollowchucks-or sockets d d willepclose the ends' of the core-bar, and hold it in the position shown in red at E. Insteadof hollow sockets or chucks, ashore described, centres may be employed, entering the eu'ds of the core-spindle, .and thus Iconfining it in position.

At each end of the apparatusthe shaftis provided witha groove, c,'cut around it,'or formedbetween two collars upon it, around which passes a ring or eye at the end of anarm, F F', bymeans of which. the two shafts can be caused to approach towards or recedefrom oach other, while still being allowed to rotate freely. The arms EF are pivoted at their cndatff, and at `their centrehave al slide, G'G,attach ed'to them by a hinge-joirit,gg.`

H Hbure vertical levers, one, ll, p ivoted'to the slide Gv', and ..the other pivoted to-a beam or block, 1:12 under the table, and the two being connected-together'byarod, I,jo inted at `cach end to theirllowerextrelnities; The slide G is hinged to the lever H above its fulcrum, the other slide forming itself. the fulcrum of the other lever, as above described.'` A stout spring, J, operates outward against the arm F.

One ofthe levers, Hl, is provided with a spring-patri, m, which acts, in connection with'a rack, m', to hold the lever xcd in any position which will enable it to keep the `core-spindle in place, -as selenin the drawings. The other lever is provided with a pirated arm, 1n,an`d' a stop, n, to hold it. I

By means of this arrangement, whenever the handle of lcver'H-is thrown' outward from lthe centre of the table, the shafts D D aredrawn apart, and the coredropped upon the arms B B, which spring slightly soas not to give it too great a jur and disturb the coating it has received,andwhenever saidl handle is thrown-inward the shafts D D are slid towards each other, and if the` core-spindlel is in lino between them, its ends will enter the sockets or chucks d d. f 1` In-practice, I iix the lever Hl in 'the proper position, and lift the arm u, allowing the'lever H to fall back, as seenin red invig. 1. This throws the shafts D D apart, when I'inscrt the core-spindle, and by bringing lever H up to tliep'sition shown in'blaek in fig. 1, I confine the core-spindle between the 'chucks d d. Ithen Lbring the nrmfit'down against the stop n', so as to hold the lever H in position, and keep the core-spindle firmly .eontinedbetween the shafts. If the spindle" should be a little loose after this has been done, I set the handle? ci leverHa notch or. two further inward, which forces the shafts together inthe same manner as when .tho' lever II was moved towards the centre. l

It might happen that'evn then the spindle would be alittle loosewere not some yprovision made tovguard against it, for were the pawl m set in one notch of the ratchet m it might leave the core 'loose in the socket, while thc neict notch might be so far that the'pawl would not enter i-t, and again, the expansion or contraction of the parts by heat or cold might sometimes loosen the core inits place.

To ohviate this di llicnlty,'I make the fulcrumfof arm F movable, and place a little rubber spring, r,

`against it, that presses it outward towards the lend of the tabl`e,'to the samedegree pressing i'ts'cther extremity inward, and forcing the'shat't D inward against the end ofthe core-spindle. This spring is'very small, it being needed only to take' up the loos`eness`that the spindle might have by requiring to be set in such a. position that the pawl m would not set exactly in the notches of the ratchet, but somewhere between two adjacent notches.

The opcrationofthe spring Jis such, as to'force the shafts D D apart and liberate the corelspindle at both ends simultaneously whenever the arm 'nis lifted from its stop n. I

One of the shafts, D, has arcrank, O, attached toit, by means of which the shafts, and the core-spindle held between them, can be rotated on their longitudinal axis.

K is a. stout straight-edge blade, firmly iii: ed tothe table A, and holding its edge close to andpnrallel with the axis of the core-spindle when the latter is supported by the sockets d d. v l Y The various parts of the machine having been thus constructed, their operation may be described as follows: The core-spindle, a cylindrical metallic barrel,.is placed in the sockets d d, and conncd there by the means above described. Itis then wound closely with rope, after which it is to be covered with a coating of loam, the outer part of which must be'pe'rfcctly smooth. l

I This machine is constructed and used for the purpose of facilitating the covering of the spindle with the loam. When the spindle has becnproperly wound with rope, the loam or other material is placed on'the table sind on the-blade K, and raked down against the'spindl'e, v vhile thelatter is caused toicvolve by means of the crank O. Its face, coming in contact with the-loam, takes up a coating of the latter, and thus perfects the core. When the coating has formed on the spindle sulicently smooth, the armA n is disen'gagedfrom the stop nl, and both shafts D D are Vretracted at once by the spring J dropping the core gently upon the receivers B B.

In making Very small cores the shafts D D may be driven. rapidly by gear-Wheels. In making large ones,

thecrank will giresullicientvvelocity. v Y

Having thus described my invention, what I claimas new, and desire to securcby L/etters Patent, is- 1. Rotating thecore or core-spindle Eby means of two shafts DD', between which itis held inl the manner described, and by which it is` applied to a blade, K, substantially as andi-'or the purpose sp'eciiied.

l i 2. The .sockets d d, b'y which the core is-helld while applied to the scraper, when connected by aired, I, and

levers H H1, so constructedand' operating that-the' sockets are caused toapproach or recede from each other simultaneously for the purpose specied. 3. .Operating the shafts D D by means of arms F F', slides G (ir,l rod I, rleversl H H, and spring J, in con# nection with pawls n m,substantially -as and for the purpose specied. l v

' BENJAMIN S. BENSON.

Witnesses:

. J. C. Benson' WM. G. PRICE. 

